﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ex11
{
    class Program
    {
        static void Main(string[] args)
        {
            Random r = new Random();
            int[] a = new int[100];
            for(int i=0;i<a.Length;i++)
            {
                a[i] = r.Next(1, 100);
            }
            int m = Convert.ToInt32(Console.ReadLine());
            for(int i=0;i<a.Length;i++)
            {
                if(m==a[i])
                {
                    Console.WriteLine("m的位置{0}", i);
                    return;
                }
            }
            Console.WriteLine("-1");
            return;
        }
        
    }
}
